A recent Pew Research Center poll shows that 52 percent of Americans believe the U.S. failed in Iraq and Afghanistan.

When Osama bin Laden was killed in 2011, 58 percent of Americans believed the U.S. would achieve its goals. That number fell to 56 percent by the time U.S. troops began pulling out in November 2013, and by January 15, 2014, only 38 percent thought the U.S. succeeded.